Patents by Inventor So NAKAJIMA
So NAKAJIMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240093120Abstract: A refrigerator oil composition may effectively suppress an increase in an acid value even when a ratio of an unsaturated fluorinated hydrocarbon compound (HFO) in a refrigerant is increased. Such a refrigerator oil composition can used for a refrigerant and may include one or more unsaturated fluorinated hydrocarbon compounds of formula (1): CxFyH??(1), wherein x is an integer of 2 to 6, y is an integer of 1 to 11, and z is an integer of 1 to 11, and one or more carbon-carbon unsaturated bonds are present in the molecule. The refrigerator oil composition may include a base oil (A), and one or more silicone compounds (B) selected from the group consisting of an unmodified silicone (B1) and a modified silicone (B2), wherein a content of the silicone compound (B) is 0.05% by mass or more based on the total amount of the refrigerator oil composition.Type: ApplicationFiled: March 15, 2022Publication date: March 21, 2024Applicant: IDEMITSU KOSAN CO.,LTD.Inventor: So NAKAJIMA
-
Publication number: 20230227747Abstract: A refrigeration machine oil composition may have good lubricating properties and sufficiently reduce friction even when a base oil containing a low-viscosity mineral oil is used and/or prevent seizure between sliding members. Such refrigeration machine oil compositions may contain a base oil containing a mineral oil, (A) at least one type selected from a specific neutral phosphate ester and an amine salt thereof, and (B) at least one type selected from a specific acidic phosphate ester, an acidic phosphite ester, and an amine salt thereof, and having a kinematic viscosity at 40° C. in a range of from 1.0 to 6.0 mm2/s.Type: ApplicationFiled: September 30, 2021Publication date: July 20, 2023Applicant: IDEMITSU KOSAN CO.,LTDInventors: Genki OKUYAMA, So NAKAJIMA
-
Publication number: 20230091226Abstract: A refrigerator oil composition with a base oil (A), and a first phosphorus compound (B). The first phosphorus compound (B) is a first phosphite ester (B1) represented by formula (1) and a second phosphite ester (B2) represented by formula (2): (R11—O—)n—PO—R12)3-n ??(1) A method of producing a refrigerator oil composition by mixing a base oil (A) with a first phosphorus compound (B). A refrigerator mixture composition includes the refrigerator oil composition and a refrigerant.Type: ApplicationFiled: January 20, 2021Publication date: March 23, 2023Applicant: IDEMITSU KOSAN CO.,LTD.Inventor: So NAKAJIMA
-
Publication number: 20230076704Abstract: A mixed composition including a refrigerant including at least one unsaturated fluorinated hydrocarbon compound selected from the compound having a formula CxFyHz, x is an integer of 2 to 6, y is an integer of 1 to 11, z is an integer of 1 to 11, and the compound has at least one unsaturated carbon-carbon bond, and a refrigerator oil including a base oil (A); a phosphorus-based extreme pressure agent (B); a decomposition inhibitor (C) that inhibits the decomposition of the unsaturated fluorinated hydrocarbon in the presence of an iron; and an antioxidant (D), wherein (C) controls the amount of fluorine in the refrigerator oil composition at 30 ppm by mass or less after mixing the refrigerator oil with R1234yf at a mass ratio of 1:1, and subjecting the mixture to an autoclave test at 175° C. for 336 hours with a metal catalyst including iron, copper, and aluminum.Type: ApplicationFiled: February 19, 2021Publication date: March 9, 2023Applicant: IDEMITSU KOSAN CO.,LTD.Inventors: So NAKAJIMA, Masaya KUBOTA
-
Patent number: 11542455Abstract: A lubricating oil composition excellent in the wear resistance and a refrigerator oil composition excellent in the oxidation stability using the lubricating oil composition are provided by a lubricating oil composition containing a base oil (A) and a phosphine derivative (B) having one or more oxygen atom in a molecule.Type: GrantFiled: January 8, 2019Date of Patent: January 3, 2023Assignee: IDEMITSU KOSAN CO., LTD.Inventor: So Nakajima
-
Publication number: 20220081513Abstract: A polyalkylene glycol-based compound of formula (1): may be one in which R1 is a monovalent hydrocarbon group having 1 to 32 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms, a monovalent acyl group having 2 to 32 carbon atoms, or a monovalent oxygen-containing hydrocarbon group having 2 to 32 carbon atoms; R2 is a monovalent hydrocarbon group having 1 to 32 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms, a monovalent acyl group having 2 to 32 carbon atoms, a monovalent oxygen-containing hydrocarbon group having 2 to 32 carbon atoms, or a hydrogen atom; R3 is a divalent hydrocarbon group having 4 carbon atoms; R4 is a divalent hydrocarbon group having 2 or 3 carbon atoms; m and n are respectively numbers between 1 and 40 and 0 and 20; and m/(m+n)?0.5.Type: ApplicationFiled: December 26, 2019Publication date: March 17, 2022Applicant: IDEMITSU KOSAN CO.,LTD.Inventors: So NAKAJIMA, Yukio YOSHIDA
-
Publication number: 20220064093Abstract: A polyalkylene glycol-based compound may have formula (1): wherein R1 is a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms; R2 is a monovalent aromatic hydrocarbon group having 6 to 42 carbon atoms or a hydrogen atom; R3 is a divalent hydrocarbon group having 2 to 4 carbon atoms; and m is a number in a range of from 1 to 40.Type: ApplicationFiled: December 26, 2019Publication date: March 3, 2022Applicant: IDEMITSU KOSAN CO.,LTD.Inventors: So NAKAJIMA, Yukio YOSHIDA
-
Patent number: 11015138Abstract: The present invention relates to a refrigerator oil containing a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof in an amount of 30 mol % or more and 100 mol % or less on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof, a refrigerator oil composition containing the refrigerator oil, and a production method of the refrigerator oil.Type: GrantFiled: December 19, 2017Date of Patent: May 25, 2021Assignee: IDEMITSU KOSAN CO., LTD.Inventors: So Nakajima, Tomoya Matsumoto
-
Publication number: 20210130729Abstract: A lubricating oil composition excellent in the wear resistance and a refrigerator oil composition excellent in the oxidation stability using the lubricating oil composition are provided by a lubricating oil composition containing a base oil (A) and a phosphine derivative (B) having one or more oxygen atom in a molecule.Type: ApplicationFiled: January 8, 2019Publication date: May 6, 2021Applicant: IDEMITSU KOSAN CO., LTD.Inventor: So NAKAJIMA
-
Publication number: 20210095222Abstract: A refrigerator oil composition containing an epoxy compound (X) having at least one of an olefin skeleton and a terpene skeleton, and a base oil (Y).Type: ApplicationFiled: August 3, 2018Publication date: April 1, 2021Applicant: IDEMITSU KOSAN CO.,LTD.Inventors: So NAKAJIMA, Tomoya USHIYAMA
-
Patent number: 10889776Abstract: The present invention relates to a refrigerator oil containing a specified amount of a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof and a specified amount of a polyvinyl ether-based compound (B) containing a structural unit (b2) of a specified structure; a refrigerator oil composition containing the refrigerator oil; and a production method the refrigerator oil.Type: GrantFiled: December 19, 2017Date of Patent: January 12, 2021Assignee: IDEMITSU KOSAN CO., LTD.Inventors: So Nakajima, Tomoya Matsumoto
-
Patent number: 10662392Abstract: The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).Type: GrantFiled: November 18, 2016Date of Patent: May 26, 2020Assignee: IDEMITSU KOSAN CO., LTD.Inventors: So Nakajima, Masato Kaneko, Tetsuhiko Fukanuma, Ryo Matsubara, Yuki Yokoi
-
Publication number: 20190292476Abstract: The present invention relates to a refrigerator oil containing a specified amount of a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof and a specified amount of a polyvinyl ether-based compound (B) containing a structural unit (b2) of a specified structure; a refrigerator oil composition containing the refrigerator oil; and a production method the refrigerator oil.Type: ApplicationFiled: December 19, 2017Publication date: September 26, 2019Applicant: IDEMITSU KOSAN CO., LTD.Inventors: So NAKAJIMA, Tomoya MATSUMOTO
-
Publication number: 20190264129Abstract: The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).Type: ApplicationFiled: November 18, 2016Publication date: August 29, 2019Applicant: IDEMITSU KOSAN CO., LTD.Inventors: So NAKAJIMA, Masato KANEKO, Tetsuhiko FUKANUMA, Ryo MATSUBARA, Yuki YOKOI
-
Publication number: 20190256789Abstract: The present invention relates to a refrigerator oil containing a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof in an amount of 30 mol % or more and 100 mol % or less on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof, a refrigerator oil composition containing the refrigerator oil, and a production method of the refrigerator oil.Type: ApplicationFiled: December 19, 2017Publication date: August 22, 2019Applicant: Idemitsu Kosan Co., Ltd.Inventors: So NAKAJIMA, Tomoya MATSUMOTO
-
Publication number: 20190233759Abstract: The present invention relates to a refrigerator oil containing (A) a mineral oil having a kinematic viscosity at 40° C. of 0.50 mm2/s or more and 8.00 mm2/s or less, (B) a polyphosphate ester-based compound, and (C) a dissolution aid for the component (B).Type: ApplicationFiled: September 25, 2017Publication date: August 1, 2019Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Masato KANEKO, Tomoya MATSUMOTO, So NAKAJIMA
-
Publication number: 20180291247Abstract: The refrigerator oil of the present invention is a refrigerator oil for a refrigerant including difluoromethane (R32), which contains a polyvinyl ether-based compound (A) including a constitutional unit (a1) having a methoxyethyl group in a side chain thereof.Type: ApplicationFiled: May 23, 2016Publication date: October 11, 2018Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Tadashi KISEN, Izumi TERADA, Mitsuru SHIBATA, Tomoya MATSUMOTO, So NAKAJIMA